. An important factor in selecting software for word processing and data base management systems is the time required to learn how to use a particular system. In order to evaluate three file management systems, a firm designed a test involving five different word processing operators. Since operator variability was believed to be a significant factor, each of the five operators was trained on each of the three file management systems. The data obtained in hours are shown. (30 points) System A B C Operator 1 16 16 24 Operator 2 19 17 22 Operator 3 14 13 19 Operator 4 13 12 18 Operator 5 18 17 22 Using .05, test to see if there is any difference in training time for the three systems. Run comparison t-tests to verify which system is different.